dougs 400 Posted December 4, 2007 Share Posted December 4, 2007 My '95 LS400 has 96,000 miles and is in great condition with the exception of a couple of irritating, transient problems. When in town between 45 and 50 mph, the transmission seems to shudder or jerk between the 3rd to OD shift. Never happens at higher speeds. This has been going on for some time with no change. Had the fluid changed and screen cleaned with no change. Anyone have a clue what this could be? Thanks for your input. Quote Link to comment Share on other sites More sharing options...
nc211 Posted December 4, 2007 Share Posted December 4, 2007 i'm trying to help you in the other thread you started about this.... Quote Link to comment Share on other sites More sharing options...
fisher972002 Posted January 31, 2008 Share Posted January 31, 2008 gotta put toyota type IV in these transmission.. You ahve TCC shutter because there is either mercon or dextron in there, someone put it in there, have it flushed and put back in Toyota Type 4 fluid only and it will fix.. Quote Link to comment Share on other sites More sharing options...
CUMan Posted February 1, 2008 Share Posted February 1, 2008 I'm not sure a flush and fill is needed. When I was having this problem on my 93 LS several years ago, I just did a drain and fill, using Type IV fluid. This stopped the shudder, and it never returned. Quote Link to comment Share on other sites More sharing options...
jcrome04 Posted February 2, 2008 Share Posted February 2, 2008 If a flush and fill fixed your shudder shouldn't there be a chance it'll do the same for him?? Quote Link to comment Share on other sites More sharing options...
Leadfoot Posted February 2, 2008 Share Posted February 2, 2008 If a flush and fill fixed your shudder shouldn't there be a chance it'll do the same for him?? A "flush and fill" is different from a "drain and fill". Draining only takes out 2 quarts, flush swaps out the entire 8.9 quarts. For most of us it's a lot easier to do a few drain and fills than try to flush the entire system (haven't seen a procedure for this yet!). Achieves pretty much the same thing though. Quote Link to comment Share on other sites More sharing options...
beaudroix Posted May 7, 2008 Share Posted May 7, 2008 My '95 LS400 has 96,000 miles and is in great condition with the exception of a couple of irritating, transient problems. When in town between 45 and 50 mph, the transmission seems to shudder or jerk between the 3rd to OD shift. Never happens at higher speeds. This has been going on for some time with no change. Had the fluid changed and screen cleaned with no change. Anyone have a clue what this could be? Thanks for your input. I have a 94' that does the same thing. Had the transmission completely drained and refilled with new fluid and it did not help. Was recently told to add some Dr Tranny - Torque Converter Shudder fix. Has anyone used this? Quote Link to comment Share on other sites More sharing options...
90LS400Lexus Posted May 10, 2008 Share Posted May 10, 2008 I have never even heard of it. Thankfully, my old LS400 (1990) and current one (1991) both had/have perfectly smooth transmissions, (knock on wood), but when I had my old 2000 Toyota Tundra it had a harsh 2nd-3rd shift. I was told to get auto RX (I think this is what it was called) for the tranny. I was supposed to be for engine or transmission concerns. I was afraid to put it in, so I never did. I did put one bottle in the engine of my 1985 Mercedes and it smoothed it out alot. I ended up selling the truck and that 2nd unused bottle of that stuff is here somewhere. Quote Link to comment Share on other sites More sharing options...
CanadaCraig Posted May 11, 2008 Share Posted May 11, 2008 My '95 LS400 has 96,000 miles and is in great condition with the exception of a couple of irritating, transient problems. When in town between 45 and 50 mph, the transmission seems to shudder or jerk between the 3rd to OD shift. Never happens at higher speeds. This has been going on for some time with no change. Had the fluid changed and screen cleaned with no change. Anyone have a clue what this could be? Thanks for your input. I have a 94' that does the same thing. Had the transmission completely drained and refilled with new fluid and it did not help. Was recently told to add some Dr Tranny - Torque Converter Shudder fix. Has anyone used this? Hi Guys!! :) I hope you're OK. I find this topic very interesting. MY transmission - or should I say - my TORQUE CONVERTER - is causing the exact same sensations. The TC clutch [so I've been told] is not always staying 'locked' and locks and unlocks at [And around] 50 MPH or so. THIS is what has been causing my car to have what I have often referred to as the 'towing a boat' feeling. [And is - so I suspect - the culprit behind why my car very often accelerates slower than it should] It's quite 'jerky' on the freeway. My Lexus dealer [in an attempt to fix the problem - because they failed to recognize it as a problem when my car was still under the extended warranty that I bought for it when I bought the car] has now flushed and filled the transmission [including the TC of course] TWICE. [At their expense] The last time [just a couple of weeks ago] using synthetic transmission fluid. [Filling the transmission with synthetic fluid when they were done] Neither 'flush and fill' fixed the problem. So now I'm looking into things like 'Dr. Tranny'. It would be interesting to see if it worked. Some websites seem to suggest that a worn clutch might be the problem. Can the clutch be replaced on a TC? Oh well.... Just felt like saying all that!! Have a great day! Craig!! :) Quote Link to comment Share on other sites More sharing options...
fisher972002 Posted May 16, 2008 Share Posted May 16, 2008 Yup Same thing happened to me when I bought my car.. Put the correct T Fluid, Type 4 in it and it will correct, easy fix.. TCC shutter, very common when people put dextron/mercon in these cars. Quote Link to comment Share on other sites More sharing options...
ramnozack Posted May 20, 2008 Share Posted May 20, 2008 If a flush and fill fixed your shudder shouldn't there be a chance it'll do the same for him?? A "flush and fill" is different from a "drain and fill". Draining only takes out 2 quarts, flush swaps out the entire 8.9 quarts. For most of us it's a lot easier to do a few drain and fills than try to flush the entire system (haven't seen a procedure for this yet!). Achieves pretty much the same thing though. MATE,CHECK OUT MY POST ON PAGE ONE OR TWO ,I THINK.I HAVE COMPLETELY DETAILED IT. G/L Quote Link to comment Share on other sites More sharing options...
nc211 Posted May 21, 2008 Share Posted May 21, 2008 Doug's original post was due to his ecm unit. He had the imfamous off-throttle-shock syndrome that several of the 95-96 years had, unfortunetly. Quote Link to comment Share on other sites More sharing options...
Hotrodls Posted August 13, 2021 Share Posted August 13, 2021 What about if the car has close to 200xxx is it still ok to just drain and fill Quote Link to comment Share on other sites More sharing options...
Bykfixer Posted August 14, 2021 Share Posted August 14, 2021 In a word, yes. Try that first. Some say the crud stuck onto parts and pieces of a high mileage tranny are what keeps seals from leaking. Quote Link to comment Share on other sites More sharing options...
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